Process for cutting a diamond to provide an invisible mounting
Patent 4738240 Issued on April 19, 1988. Estimated Expiration Date: 
October 23, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 23, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 732119 835964 2141363 3421341 Precision cutting of millimeter wave ferrite materials Patent #: 4564000 InventorAssigneeApplicationNo. 06/922843 filed on 10/23/1986US Classes:125/30.01, PRECIOUS STONE WORKING63/26GEM SETTINGExaminersPrimary: Whitehead, Harold D.Attorney, Agent or FirmInternational ClassesA44C 17/00 (20060101)A44C 17/04 (20060101) B28D 5/00 (20060101) AbstractA process for cutting a diamond to realize an invisible mounting by using cuts situated below the girdle in which may be engaged the mounting. According to the invention the notches (7) have the shape of a dihedron (4) of which the two surfaces (5-6) are situated on both sides of the plane of the natural table along which is oriented the polished table (1), the two surfaces (5-6) of each dihedron being themselves polished by using a sawing machine in which the diamond carrier is movably mounted along a direction parallel to the plane of the disk and driven in an alternating motion along this direction, the surface of the disk being coated with a mixture of bort and gum arabic diluted with water, the polishing speed of the surface of the disk with respect to the diamond being comprised between 2500 and 3200 m/min., with about 10 passages per minute of the diamond in contact with the surface of the disk.Field of SearchGEM SETTING | |
